Steel ventilating double blind



Filed Ma .y 20, '1936 T. LLOYD El AL STEEL VENTILATING DOUBLE BLIND o on on o 00 0000 none 0000 o o coo o 00 00 once 00 o 0 o 0 000 o o oo o June 1, 19 37.

Inventors: 7740/745 LLOYD and fie/k Ufa/0% 1 O/v/ODOOOO o o o o o n o o o oo o 0000 oo oo o 0o 0 o o o 0000 o 0000 oo a a o 0000 00000 0 I I l Patented June 1, 1937 STEEL VENTILATING DOUBLE BLIND Thomas Lloyd, East Pittsburgh, and Paul W. Sylvander, MoKcesport, Pa.

Application May 20, 1936, Serial-No. 80,829

The present invention relates to a steel ventilating double blind construction including an upper supporting means for the double blind in the form of an idler roller and a spring roller, which carries the blind, concealed in and movable with a ventilating box or chamber which is provided withmeans for attaching the inner blind portion to the ventilating chamber.

An object of the present invention resides in providing small perforations, of various designs, in the blind at spaced areas to permit circulation of air between the inner and outer portion thereof when the window sash is opened.

Other objects and advantages will become apparent as the novel features of this invention are more fully hereinafter described.

Figure 1 is a front elevation showing the double blind and ventilating chamber and supporting means,

Figure 2 is a side elevation, and

Figure 3 is a detailed section of the ventilating chamber showing the spring roller and attaching means for the free end of the blind.

In the drawing, 2 represents a steel spring roller suitably secured and positioned within a steel ventilating box. or chamber 3. The ventilating box orchan'iber 3 is provided, on opposite sides, with louvers or stamped out portions 4 projecting inwardly and downwardly within said chamber 3.

An opening 3a. is provided in the upper portion of the chamber 3 to permit the flexible steel blind 5 to pass upwardly therethrough and over an idler roller 6 secured to the upper frame of the window for supporting the blind and ventilating structure.

The free end of the blind 5 after passing over the idler roller 6- is' secured, as shown at I, in

any suitable manner, to the ventilating chamber 3. The blind may be provided,- at suitably determined spaced intervals or over its entire surface, if desired, by perforations of various designs, shown forillustration as at 8 and 9. This will permit the entrance of air through the blind when the window sash is opened. Circulation of air will also be obtained at the sides of the blinds.

When the blind 5 is withdrawn from the varitilating chamber 3 and passed over' the idler roller 6 and secured to' thehinged lid of the ventilating box, the entire assembly is supported by the idler roller 6. When the ventilating.

chamber 3 is raised, the blind 5 will automati- 8 Claims. (01. 98-88) cally roll upon the spring roller 2 within the ventilating chamber 3. When the blind is drawn, with the ventilating chamber resting on the window sill, the perforations 8 and 9 will permit passage of air between the inner and outer blind. 5

a ventilating chamber, a spring roller secured within said ventilating chamber, a thin flexible sheet steel blind secured to said roller, said steel blind adapted to project upwardly from said roller and through said ventilating chamber, an

idler roller adapted to supportsaid thin flexible sheet steel blind and ventilating chamber, and means adapted to secure one end of said blind to said ventilating chamber, said flexible sheet steel blind being provided with perforations at alternate positions to permit the entrance of air therethrough.

2. A flexible ventilating blind construction comprising a ventilating chamber, a spring roller supported within and movable with said ventilating chamber, a flexible perforated steel blind carried by said spring roller, an idler roller adapted to support said steel blind and ventilating chamber and means adapted to secure one end ofsaid steel blind to said ventilating chamber whereby said steel blind is wound and unwound on said spring roller upon vertical movement of said ventilating chamber.

3. A ventilating steel double blind construction comprising a ventilating chamber, a flexible ventilated steel blind and supporting means therefor, said supporting means comprising an idler roller, a spring roller concealed'in and movable with said ventilating chamber, said flexible ventilated'steel blind secured, to said spring roller "and adapted to extend upwardly through said "ventilating chamber and over said idler roller to provide inner and outer blind portions, and means for securing the end of said flexible steel ventilated blind to said ventilating chamber to provide an air passage between said inner and outer blind portions.

THOMAS LLOYD. PAUL W. SYLVANDER.

since various modifications may be 10 

